Rope-knife guide



June 2, 1925.

W. W. DYMOND ROPE KNIFE GUIDE 'Filed April s, 192s I N VEN TOR. i7zoyz.

A TTORNEY- lill!!! .z12M.:55:55.: J m A Patented June 2, 1925.

ENT OFFICE.

Y WILLIAM WALLACE DYMOND, vF CARBONDALE, KANSAS.

ROPE-KNIFE GUIDE.

Application led April 5, 1923.V Serial No. 629,986.

To @ZZ whom t may concern.'

Be it known that I, VILLTAM WALLACE DrMoND, a citizen of the United States, and resident of Carbondale, county of Osage,

State of Kansas, have invented a certain new and useful Improvement in Rope-Knife Guides, of which the following is a complete specilication.

This invention relates to rope knife guides and my object is to produce a tool for oil well and other purposes, for use with a sand line whereby the tool line may be sufficiently and readily secured close to the tools regardless of the depth of the well and dil5 ameter of the casing, whenthevtools have become wedged in the hole and it is necessary to :[ish them out.

Vith the present tools, it is found eX- tremely diflicult in deep wells using small size casing such as 6% and 81/4, when it is desired to remove the tool line after the tools have become wedged in the bottom of the hole, to lower af rope knife into such deep well without the rope'knife or sand line entanglincr and becoming twisted with the tool line which it is desired to remove.

The entanglement above mentioned has been discovered to be due to the fact that therope knife, jars and sinker will often rotate in the casing and, even when a swivel is employed, will become twisted around the tool line so that force applied for cuttingthe tool line is actually expended in clamping the sand rope upon the tool rope without in any way applying` cutting action thereon. Y

The primary object of the invention,

therefore, is to provide a knife guide which will efliciently prevent the turning action of the knife and carrying tools and rope within the casing. i

Vith the object named in view, the invention consists in certain novel and useful. features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawing, in whichs- Figure 1 is a central vertical section taken through an oil well casing and illustrates the relation the tool of the invention will bear to the other parts of a rope knife suspended by a sand line into a well,

VFigure 2 is an enlarged section on the line II-II of Figure l;

Figure 3 is a section onthe line III-III of Figure 2; Y

Figure 4. is a section on the line IV-IV of Figure 3;

Figure 5 is a face view of the tool; and

Figure 6 is a perspective view of one of the carrier guides forming, a part of the invention. Y

In the'said drawing, where like reference characters identify corresponding parts in all of the figures, 1 represents the oil well casing, shown in two sections coupled together by a coupling 2, the upper and lower casing sections not being screwed into abutting relation but leaving a space 3, as often occurs in the placing of a casing section.

The tool line, which it is desired to sever, is indicated at 4, the sand line used to support the rope 4knife is indicated at 5, said sand line having a swivel connection with. the Vupper end of a sinker 7, secured atits lower end to the customary` jars 8, which in turn suspends the rope knife 9. All of the parts above-referred to are of any common or preferred construction.

The tool of the invention consists of a pair of carriers 10, see Figure 6, comprising vertical back portions, top and bottom portions 11, and side wings 12. Each of said casings in the tool, as illustrated, is welded or otherwise fiXedly secured to and between a pair of side plates 13, which are provided at suitable points with threaded openings for engagement by cap screws 14, which secure the parts above described in position between and at opposite ends of a Vpair of clamp plates 15, it being noted that the carrier guides, are spaced apart a suiii cient distance to provide anopening 153L of width slightly greater than the diameter of any sinker rod with which the tool is intended for use.

Slidingly .mounted in each of the carrier guides 10 are carriers 16, it being noted in this connection that the frictional engagement of the sides of the carriers with the guides will be relatively small as such engagement will be with the wings 12 alone. The outer corners of each of said carriers are bifurcated as at .1.7 for the reception of knife-edge rollers- 18 journaled on pins 19 mounted in the carriers. Each of the carriers is formed on its rear face with a pair of protuberances 20 carrying expansion springs 23 pressing against the back of the carrier guide 10. The carriers are limited, both Ias ito outward and .inward movement, by a pairof screws 24 which project through slots 25 formed in the topI and bottom 11 of the carrier guide l0.

In the use of the device one of the side plates is removed from position and the sinker rod 7 is received within the space 15EL thus made accessible, the p'late 15 is the-n returned to position and the tool is lixedly clamped to the sinker rod '7 Eby means of a `series ,of clamp screws 26.

V pended by the 'line 4. It will be apparent from a consideration of the Ldevice as described ,and illustrated, that it ,the springs, 23 are suthciently stilythe knife rollers will strongly vpress against the wall oi the casing and will overcome `any tendency the rope vknife and lits access-cries may have to turn or'twist wthin ithe casing. y

rPhe tool "is so `proportioned that when a space 3, k'betweenthe ends of adjacent casing sections is encountered, one o each pair of rollers will always 'be in Contact with the casing wall, and will thus prevent .any possibility of a single roller of either pair entering `the space far enough to become wedged and prevent yfurther downward movement of the cutting tools,.and also, that by retaining one of each pair of rollers in contact with the easing, while the other rollers .are passing the space 3 that there is no chance for any twisting or turning movement of the guide and string ot' cutting tools. lith `the parts arranged as explained. will be apparent that upward `torcefapplied on the ,sand line will be transmitted directing to the cutting elements of `the kniteand that the proximity thereof to the drilling tools will `elt`ect the severance o'l' the .tool line in close proximity to the tools, and `that when this is accomplished the sand line and its equipment is removed to permit fishing tools to be'employed in the customary ymanner/'for effecting the removal of the drilling tools. It will also be noted that the guide'does notinterfere with the tool line other than Vto simply Vpress it to one side as indicated most clearly in Figures 2 and 4.

It is believed :that lthe 4construction and operation of the tool has been sul'liciently set out has :to make further recapitulation of the operation unnecessary. It is desired to state, however, that the length of the slots 25 in the carrier guides and vthe proportion oli' the parts of each tool may be such as to yaccommodate well casings of varying diameter within certain limits, as willbe readi- 'ly understood.

,It will be evident from the above description that Ihave vproduced a `tool ooit. the character described which possesses all oit the. Jfeatures of advantage pointed `out as desirable, and while I have described and claimed the preferred embodiment f of the same,l :reserve the right to make/all changes properly falling within the spirit and scope of the appended claims.

l clainiz 1. The' combination with a well casing, o a rope-suspended tool within the casing, and a guide carried by the Itool and comprising a 'body portion, spring-advanced carriers mounted in the 'body at diametrically opposite Vsides thereof, and a 4pair of rollers spaced vertically apart and journaled on and projecting beyond 4the carriers and `engaging the casing. V

r42. The combination with a vwell casing, of a :rope-cutting mechanism therein and engaging airope to be cut, a rope suspending such .mechanismA within the casing, :and a guide mounted on Vsaid cutting mechanism, and comprising a body portion, carriers radially adjustable thereon with respect tothe casing, a pair of vertically suspended edgerollers journaled on and at the outer sides of each carrier, and springs interposed between 'the ,body portion and the carriers to hold said rollers in contact with the easing.

3. Agude, comprising a body portion, a pair of carriers oppositely mounted in said Vbody portion, ajplura'lity of spaced rollers carried 'by each of said carriers and `projecting beyond the same, `and a series of springs for each of said carriers pressing .at oneo't theirend's against the body-portion and at their other ends against their respective car riers.v l l y ,ln witness whereof I hereunto allix luy signature;

VLLIA'M lVAvILLKAGE DYMOND. 

